LL Test

[Primeinator]

I've only heard giga used as a prefix for units. 10^9 I've always heard referred to as one billion.

[Mini-Geek]

Yes, I meant giga. Maybe it wasn't really right for that situation, but I'm just used to using K, M, G, etc. as kilo, mega, giga, etc. even in situations involving numbers. For example, in sieving you almost always refer to G and T, and not billion and trillion or 10^9 and 10^12. Why is it like this? I don't really know. Also, "megabit prime" is a fairly common term referring to primes that in binary form have over 10^6 digits, so I suppose you could extend that to "gigabit candidate" for Mersenne's over 2^10^9 a.k.a. 2^1G a.k.a. 2^1B.

And no, PrimeNet v5 has absolutely no support, as far as I can tell, for p>1G. You can't request the status of those exponents. Prime95 can't even run LL tests that large. It can factor numbers that big, but when you manually add them to the worktodo and communicate with the Overmind (PrimeNet), it says:

pnErrorResult=40
pnErrorDetail=ra: trial factoring not required, exponent: 1000000901, ef: 80
==END==

Prime95 can still factor it, but PrimeNet doesn't recognize it

[10metreh]

Originally Posted by Mini-Geek

Yes, I meant giga. Maybe it wasn't really right for that situation, but I'm just used to using K, M, G, etc. as kilo, mega, giga, etc. even in situations involving numbers. For example, in sieving you almost always refer to G and T, and not billion and trillion or 10^9 and 10^12. Why is it like this? I don't really know.

Will quadrillions be represented as P when we come to them? It seems rather unnatural.

[Mini-Geek]

Originally Posted by 10metreh

Will quadrillions be represented as P when we come to them? It seems rather unnatural.

Yes. It's already used in some very large sieving applications. e.g. at http://www.primegrid.com/forum_thread.php?id=1230#13578

[cheesehead]

Originally Posted by 10metreh

Will quadrillions be represented as P when we come to them? It seems rather unnatural.

Metric system. After P comes E, Z and Y.

For the current official prefixes, see http://www.bipm.org/en/si/prefixes.html

For someone's idea for future extensions beyond P, E, Z and Y (... X, W, V, U, TD, S, R, Q, PP, O, N, MI, L), see http://jimvb.home.mindspring.com/unitsystem.htm

Originally Posted by Mini-Geek

Yes. It's already used in some very large sieving applications. e.g. at http://www.primegrid.com/forum_thread.php?id=1230#13578

However, a footnote to the next message, #16318, shows that not everyone fully accepts the decimal basis for those prefixes.

[Uncwilly]

Originally Posted by cheesehead

Metric system. After P comes E, Z and Y.

Thus the expression Eazy PEZY.